index.d.ts for analytics.js

index.d.ts

/// <reference lib="dom"/>

declare function Analytics(opts: Analytics.IOptions): Analytics.IAnalytics

declare namespace Analytics {
  interface IOptions {
    app: string,
    plugins: object[]
  }
  
  interface IPageData {
    title?: string
    url?: string
    path?: string
    referrer?: string
  }
  
  interface ITraits {
    [key: string]: string | number | boolean | undefined
  }
  
  interface IAnalytics {
    page: (data?: IPageData) => void,
    track: (event: string, traits?: ITraits) => void,
    identify: (userId: string, traits?: ITraits) => void,
    ready: (cb: () => void) => void
  }
}

export = Analytics